Furnace Pilot Light Won’t Stay Lit

Tools That May Help

Before calling a professional, these common tools may help you check the issue safely.

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Problem

Pilot light ignites but won’t remain lit.

Common Symptoms

  • Weak airflow from vents
  • System running constantly
  • Uneven indoor temperatures
  • Higher energy bills

Possible Causes

  • Thermocouple failure
  • gas pressure issue
  • dirty pilot

How To Fix It

  • Clean pilot
  • replace thermocouple
  • check gas flow

Safety Tip

Always shut off power to the HVAC system before inspecting wiring or internal components.

When To Call A Professional

If pilot won’t stay lit, call a professional

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